Originally posted by Demonic Phoenix
We already saw what happens when Killerbee tries to beat up Kisame. Kisame either uses Samehada to absorb Bee's chakra and nullify the attack, or he uses Samehada to regenerate his wound.Bee definitely needed that ridiculous amount of PIS. Without Samehada turning on Kisame like that, he would have lost both the fight, and his legs.
Even if he had released Hachibi, Samehada would likely have reverted Hachibi back into Killerbee. After all, it reverted V2 back into V1.
I'm not saying that Bee should have just beat him up in that encounter, i'm saying Kubo should have written the fight so that Kisame was not so overpowering, and simply lost to Killerbee in a fair fight. Then there would have been no PIS and it would have been pretty consistent with what was known about the characters.